ASTROSAT CZTI

Data Quality Report

Orbit 20200926_T03_241T01_9000003902_level2

Creation date: 2021-01-08T02:50:08.516754
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1T03_241T01_9000003902cztM0_level2_bc.evt modeM0/AS1T03_241T01_9000003902cztM0_level2_quad_clean.evt
Size (bytes)477,682,560188,280,000
Size455.6 MB 179.6 MB
Events in quadrant A6,032,3761,056,748
Events in quadrant B2,398,8461,360,846
Events in quadrant C2,082,7261,315,040
Events in quadrant D3,255,6501,268,645

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0490170
B0217330
C0211680
D0252750

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02060
B02060
C02060
D02060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10099399539.558372%
B10099850.841667%
C100991401.386276%
D100994154.109318%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 12038 10095 2 2 0.02% 0.02%
B 12039 10097 3 3 0.02% 0.03%
C 12039 10097 0 0 0.00% 0.00%
D 12039 10097 27 27 0.22% 0.27%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 14 235 4310996 45160.61 428 420 95.4
A 6 16 31078 321.19 428 420 95.4
A 0 13 17150 175.28 428 420 95.4
B 0 189 136325 1286.64 541 529 105.5
B 3 64 136034 1283.88 541 529 105.5
B 0 219 17746 163.13 541 529 105.5
C 15 208 57301 444.58 524 520 127.7
C 4 224 4674 32.52 524 520 127.7
C 10 22 3059 19.88 524 520 127.7
D 2 250 604496 4895.02 525 507 123.4
D 1 52 308705 2497.79 525 507 123.4
D 12 233 165701 1338.81 525 507 123.4

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter